textproc/libinfinity: New port: Collaborative editing library

- Submitter becomes maintainer

libinfinity is library to build collaborative text editors. Changes to the text
buffers are synced to all other clients over a central server. Even though a
central server is involved, the local user sees his changes applied instantly
and the merging is done on the individual clients.

WWW:		https://github.com/gobby/libinfinity
PR:		283863